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path: root/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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Diffstat (limited to 'lib/CodeGen/AsmPrinter/DwarfDebug.cpp')
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfDebug.cpp278
1 files changed, 19 insertions, 259 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index fbf6526396..7be2f64003 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -514,8 +514,7 @@ void DwarfDebug::addSourceLine(DIE *Die, DIVariable V) {
unsigned Line = V.getLineNumber();
if (Line == 0)
return;
- unsigned FileID = GetOrCreateSourceID(V.getContext().getDirectory(),
- V.getContext().getFilename());
+ unsigned FileID = GetOrCreateSourceID(V.getContext().getFilename());
assert(FileID && "Invalid file id");
addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
@@ -531,8 +530,7 @@ void DwarfDebug::addSourceLine(DIE *Die, DIGlobalVariable G) {
unsigned Line = G.getLineNumber();
if (Line == 0)
return;
- unsigned FileID = GetOrCreateSourceID(G.getContext().getDirectory(),
- G.getContext().getFilename());
+ unsigned FileID = GetOrCreateSourceID(G.getContext().getFilename());
assert(FileID && "Invalid file id");
addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
@@ -551,8 +549,7 @@ void DwarfDebug::addSourceLine(DIE *Die, DISubprogram SP) {
unsigned Line = SP.getLineNumber();
if (!SP.getContext().Verify())
return;
- unsigned FileID = GetOrCreateSourceID(SP.getDirectory(),
- SP.getFilename());
+ unsigned FileID = GetOrCreateSourceID(SP.getFilename());
assert(FileID && "Invalid file id");
addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
@@ -568,8 +565,7 @@ void DwarfDebug::addSourceLine(DIE *Die, DIType Ty) {
unsigned Line = Ty.getLineNumber();
if (Line == 0 || !Ty.getContext().Verify())
return;
- unsigned FileID = GetOrCreateSourceID(Ty.getDirectory(),
- Ty.getFilename());
+ unsigned FileID = GetOrCreateSourceID(Ty.getFilename());
assert(FileID && "Invalid file id");
addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
@@ -586,9 +582,8 @@ void DwarfDebug::addSourceLine(DIE *Die, DINameSpace NS) {
if (Line == 0)
return;
StringRef FN = NS.getFilename();
- StringRef Dir = NS.getDirectory();
- unsigned FileID = GetOrCreateSourceID(Dir, FN);
+ unsigned FileID = GetOrCreateSourceID(FN);
assert(FileID && "Invalid file id");
addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
@@ -1772,41 +1767,21 @@ DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) {
/// source file names. If none currently exists, create a new id and insert it
/// in the SourceIds map. This can update DirectoryNames and SourceFileNames
/// maps as well.
-unsigned DwarfDebug::GetOrCreateSourceID(StringRef DirName, StringRef FileName){
- unsigned DId;
- assert (DirName.empty() == false && "Invalid directory name!");
+unsigned DwarfDebug::GetOrCreateSourceID(StringRef FileName){
// If FE did not provide a file name, then assume stdin.
if (FileName.empty())
- return GetOrCreateSourceID(DirName, "<stdin>");
+ return GetOrCreateSourceID("<stdin>");
- StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
- if (DI != DirectoryIdMap.end()) {
- DId = DI->getValue();
- } else {
- DId = DirectoryNames.size() + 1;
- DirectoryIdMap[DirName] = DId;
- DirectoryNames.push_back(DirName);
- }
-
- unsigned FId;
- StringMap<unsigned>::iterator FI = SourceFileIdMap.find(FileName);
- if (FI != SourceFileIdMap.end()) {
- FId = FI->getValue();
- } else {
- FId = SourceFileNames.size() + 1;
- SourceFileIdMap[FileName] = FId;
- SourceFileNames.push_back(FileName);
- }
+ StringMapEntry<unsigned> &Entry = SourceIdMap.GetOrCreateValue(FileName);
+ if (Entry.getValue())
+ return Entry.getValue();
- DenseMap<std::pair<unsigned, unsigned>, unsigned>::iterator SI =
- SourceIdMap.find(std::make_pair(DId, FId));
- if (SI != SourceIdMap.end())
- return SI->second;
+ unsigned SrcId = SourceIdMap.size();
+ Entry.setValue(SrcId);
- unsigned SrcId = SourceIds.size() + 1; // DW_AT_decl_file cannot be 0.
- SourceIdMap[std::make_pair(DId, FId)] = SrcId;
- SourceIds.push_back(std::make_pair(DId, FId));
+ // Print out a .file directive to specify files for .loc directives.
+ Asm->OutStreamer.EmitDwarfFileDirective(SrcId, FileName);
return SrcId;
}
@@ -1832,7 +1807,7 @@ void DwarfDebug::constructCompileUnit(const MDNode *N) {
DICompileUnit DIUnit(N);
StringRef FN = DIUnit.getFilename();
StringRef Dir = DIUnit.getDirectory();
- unsigned ID = GetOrCreateSourceID(Dir, FN);
+ unsigned ID = GetOrCreateSourceID(FN);
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
@@ -2079,23 +2054,6 @@ void DwarfDebug::beginModule(Module *M) {
// Prime section data.
SectionMap.insert(Asm->getObjFileLowering().getTextSection());
-
- // Print out .file directives to specify files for .loc directives. These are
- // printed out early so that they precede any .loc directives.
- if (Asm->MAI->hasDotLocAndDotFile()) {
- for (unsigned i = 1, e = getNumSourceIds()+1; i != e; ++i) {
- // Remember source id starts at 1.
- std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(i);
- // FIXME: don't use sys::path for this! This should not depend on the
- // host.
- sys::Path FullPath(getSourceDirectoryName(Id.first));
- bool AppendOk =
- FullPath.appendComponent(getSourceFileName(Id.second));
- assert(AppendOk && "Could not append filename to directory!");
- AppendOk = false;
- Asm->OutStreamer.EmitDwarfFileDirective(i, FullPath.str());
- }
- }
}
/// endModule - Emit all Dwarf sections that should come after the content.
@@ -2185,9 +2143,6 @@ void DwarfDebug::endModule() {
// Corresponding abbreviations into a abbrev section.
emitAbbreviations();
- // Emit source line correspondence into a debug line section.
- emitDebugLines();
-
// Emit info into a debug pubnames section.
emitDebugPubNames();
@@ -2873,17 +2828,6 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
SmallPtrSet<const MDNode *, 16> ProcessedVars;
collectVariableInfo(MF, ProcessedVars);
- // Get function line info.
- if (!Lines.empty()) {
- // Get section line info.
- unsigned ID = SectionMap.insert(Asm->getCurrentSection());
- if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
- std::vector<SrcLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
- // Append the function info to section info.
- SectionLineInfos.insert(SectionLineInfos.end(),
- Lines.begin(), Lines.end());
- }
-
// Construct abstract scopes.
for (SmallVector<DbgScope *, 4>::iterator AI = AbstractScopesList.begin(),
AE = AbstractScopesList.end(); AI != AE; ++AI) {
@@ -2934,7 +2878,6 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
AbstractVariables.clear();
LabelsBeforeInsn.clear();
LabelsAfterInsn.clear();
- Lines.clear();
PrevLabel = NULL;
}
@@ -2981,7 +2924,6 @@ DbgScope *DwarfDebug::findDbgScope(const MachineInstr *MInsn) {
/// the source line list.
MCSymbol *DwarfDebug::recordSourceLine(unsigned Line, unsigned Col,
const MDNode *S) {
- StringRef Dir;
StringRef Fn;
unsigned Src = 1;
@@ -2990,29 +2932,26 @@ MCSymbol *DwarfDebug::recordSourceLine(unsigned Line, unsigned Col,
if (Scope.isCompileUnit()) {
DICompileUnit CU(S);
- Dir = CU.getDirectory();
Fn = CU.getFilename();
} else if (Scope.isFile()) {
DIFile F(S);
- Dir = F.getDirectory();
Fn = F.getFilename();
} else if (Scope.isSubprogram()) {
DISubprogram SP(S);
- Dir = SP.getDirectory();
Fn = SP.getFilename();
} else if (Scope.isLexicalBlock()) {
DILexicalBlock DB(S);
- Dir = DB.getDirectory();
Fn = DB.getFilename();
} else
assert(0 && "Unexpected scope info");
- Src = GetOrCreateSourceID(Dir, Fn);
+ Src = GetOrCreateSourceID(Fn);
}
- MCSymbol *Label = MMI->getContext().CreateTempSymbol();
- Lines.push_back(SrcLineInfo(Line, Col, Src, Label));
+ Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, DWARF2_FLAG_IS_STMT,
+ 0, 0);
+ MCSymbol *Label = MMI->getContext().CreateTempSymbol();
Asm->OutStreamer.EmitLabel(Label);
return Label;
}
@@ -3323,185 +3262,6 @@ void DwarfDebug::emitEndOfLineMatrix(unsigned SectionEnd) {
Asm->EmitInt8(1);
}
-/// emitDebugLines - Emit source line information.
-///
-void DwarfDebug::emitDebugLines() {
- // If the target is using .loc/.file, the assembler will be emitting the
- // .debug_line table automatically.
- if (Asm->MAI->hasDotLocAndDotFile())
- return;
-
- // Minimum line delta, thus ranging from -10..(255-10).
- const int MinLineDelta = -(dwarf::DW_LNS_fixed_advance_pc + 1);
- // Maximum line delta, thus ranging from -10..(255-10).
- const int MaxLineDelta = 255 + MinLineDelta;
-
- // Start the dwarf line section.
- Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfLineSection());
-
- // Construct the section header.
- Asm->OutStreamer.AddComment("Length of Source Line Info");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("line_end"),
- Asm->GetTempSymbol("line_begin"), 4);
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("line_begin"));
-
- Asm->OutStreamer.AddComment("DWARF version number");
- Asm->EmitInt16(dwarf::DWARF_VERSION);
-
- Asm->OutStreamer.AddComment("Prolog Length");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("line_prolog_end"),
- Asm->GetTempSymbol("line_prolog_begin"), 4);
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("line_prolog_begin"));
-
- Asm->OutStreamer.AddComment("Minimum Instruction Length");
- Asm->EmitInt8(1);
- Asm->OutStreamer.AddComment("Default is_stmt_start flag");
- Asm->EmitInt8(1);
- Asm->OutStreamer.AddComment("Line Base Value (Special Opcodes)");
- Asm->EmitInt8(MinLineDelta);
- Asm->OutStreamer.AddComment("Line Range Value (Special Opcodes)");
- Asm->EmitInt8(MaxLineDelta);
- Asm->OutStreamer.AddComment("Special Opcode Base");
- Asm->EmitInt8(-MinLineDelta);
-
- // Line number standard opcode encodings argument count
- Asm->OutStreamer.AddComment("DW_LNS_copy arg count");
- Asm->EmitInt8(0);
- Asm->OutStreamer.AddComment("DW_LNS_advance_pc arg count");
- Asm->EmitInt8(1);
- Asm->OutStreamer.AddComment("DW_LNS_advance_line arg count");
- Asm->EmitInt8(1);
- Asm->OutStreamer.AddComment("DW_LNS_set_file arg count");
- Asm->EmitInt8(1);
- Asm->OutStreamer.AddComment("DW_LNS_set_column arg count");
- Asm->EmitInt8(1);
- Asm->OutStreamer.AddComment("DW_LNS_negate_stmt arg count");
- Asm->EmitInt8(0);
- Asm->OutStreamer.AddComment("DW_LNS_set_basic_block arg count");
- Asm->EmitInt8(0);
- Asm->OutStreamer.AddComment("DW_LNS_const_add_pc arg count");
- Asm->EmitInt8(0);
- Asm->OutStreamer.AddComment("DW_LNS_fixed_advance_pc arg count");
- Asm->EmitInt8(1);
-
- // Emit directories.
- for (unsigned DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
- const std::string &Dir = getSourceDirectoryName(DI);
- if (Asm->isVerbose()) Asm->OutStreamer.AddComment("Directory");
- Asm->OutStreamer.EmitBytes(StringRef(Dir.c_str(), Dir.size()+1), 0);
- }
-
- Asm->OutStreamer.AddComment("End of directories");
- Asm->EmitInt8(0);
-
- // Emit files.
- for (unsigned SI = 1, SE = getNumSourceIds()+1; SI != SE; ++SI) {
- // Remember source id starts at 1.
- std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(SI);
- const std::string &FN = getSourceFileName(Id.second);
- if (Asm->isVerbose()) Asm->OutStreamer.AddComment("Source");
- Asm->OutStreamer.EmitBytes(StringRef(FN.c_str(), FN.size()+1), 0);
-
- Asm->EmitULEB128(Id.first, "Directory #");
- Asm->EmitULEB128(0, "Mod date");
- Asm->EmitULEB128(0, "File size");
- }
-
- Asm->OutStreamer.AddComment("End of files");
- Asm->EmitInt8(0);
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("line_prolog_end"));
-
- // A sequence for each text section.
- unsigned SecSrcLinesSize = SectionSourceLines.size();
-
- for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
- // Isolate current sections line info.
- const std::vector<SrcLineInfo> &LineInfos = SectionSourceLines[j];
-
- // Dwarf assumes we start with first line of first source file.
- unsigned Source = 1;
- unsigned Line = 1;
-
- // Construct rows of the address, source, line, column matrix.
- for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
- const SrcLineInfo &LineInfo = LineInfos[i];
- MCSymbol *Label = LineInfo.getLabel();
- if (!Label->isDefined()) continue; // Not emitted, in dead code.
-
- if (Asm->isVerbose()) {
- std::pair<unsigned, unsigned> SrcID =
- getSourceDirectoryAndFileIds(LineInfo.getSourceID());
- Asm->OutStreamer.AddComment(Twine(getSourceDirectoryName(SrcID.first)) +
- "/" +
- Twine(getSourceFileName(SrcID.second)) +
- ":" + Twine(LineInfo.getLine()));
- }
-
- // Define the line address.
- Asm->OutStreamer.AddComment("Extended Op");
- Asm->EmitInt8(0);
- Asm->OutStreamer.AddComment("Op size");
- Asm->EmitInt8(Asm->getTargetData().getPointerSize() + 1);
-
- Asm->OutStreamer.AddComment("DW_LNE_set_address");
- Asm->EmitInt8(dwarf::DW_LNE_set_address);
-
- Asm->OutStreamer.AddComment("Location label");
- Asm->OutStreamer.EmitSymbolValue(Label,
- Asm->getTargetData().getPointerSize(),
- 0/*AddrSpace*/);
-
- // If change of source, then switch to the new source.
- if (Source != LineInfo.getSourceID()) {
- Source = LineInfo.getSourceID();
- Asm->OutStreamer.AddComment("DW_LNS_set_file");
- Asm->EmitInt8(dwarf::DW_LNS_set_file);
- Asm->EmitULEB128(Source, "New Source");
- }
-
- // If change of line.
- if (Line != LineInfo.getLine()) {
- // Determine offset.
- int Offset = LineInfo.getLine() - Line;
- int Delta = Offset - MinLineDelta;
-
- // Update line.
- Line = LineInfo.getLine();
-
- // If delta is small enough and in range...
- if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
- // ... then use fast opcode.
- Asm->OutStreamer.AddComment("Line Delta");
- Asm->EmitInt8(Delta - MinLineDelta);
- } else {
- // ... otherwise use long hand.
- Asm->OutStreamer.AddComment("DW_LNS_advance_line");
- Asm->EmitInt8(dwarf::DW_LNS_advance_line);
- Asm->EmitSLEB128(Offset, "Line Offset");
- Asm->OutStreamer.AddComment("DW_LNS_copy");
- Asm->EmitInt8(dwarf::DW_LNS_copy);
- }
- } else {
- // Copy the previous row (different address or source)
- Asm->OutStreamer.AddComment("DW_LNS_copy");
- Asm->EmitInt8(dwarf::DW_LNS_copy);
- }
- }
-
- emitEndOfLineMatrix(j + 1);
- }
-
- if (SecSrcLinesSize == 0)
- // Because we're emitting a debug_line section, we still need a line
- // table. The linker and friends expect it to exist. If there's nothing to
- // put into it, emit an empty table.
- emitEndOfLineMatrix(1);
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("line_end"));
-}
-
/// emitCommonDebugFrame - Emit common frame info into a debug frame section.
///
void DwarfDebug::emitCommonDebugFrame() {
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